From b320f80a6a02bbf31f7ed6ab3332f7c4ebaaac2c Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Thu, 8 Apr 2010 01:02:49 -0300 Subject: [PATCH] V4L/DVB: ir-core: properly present the supported and current protocols Hardware decoders have a more limited set of decoders than software ones. In general, they support just one protocol at a given time, but allow changing between a few options. Rename the previous badly named "current_protocol" as just "protocol", meaning the current protocol(s) accepted by the driver, and add a "support_protocols" to represent the entire universe of supported protocols by that specific hardware. As commented on http://lwn.net/Articles/378884/, the "one file, one value" rule doesn't fit nor does make much sense for bitmap or enum values. So, the supported_protocols will enum all supported protocols, and the protocol will present all active protocols. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/IR/ir-sysfs.c | 63 ++++++++++++++++++++++++++----------- 1 file changed, 44 insertions(+), 19 deletions(-) diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c index 81eebd8eae5a..e47a4f102637 100644 --- a/drivers/media/IR/ir-sysfs.c +++ b/drivers/media/IR/ir-sysfs.c @@ -56,13 +56,13 @@ static ssize_t show_protocol(struct device *d, if (ir_type == IR_TYPE_UNKNOWN) s = "Unknown"; else if (ir_type == IR_TYPE_RC5) - s = "RC-5"; + s = "rc-5"; else if (ir_type == IR_TYPE_PD) - s = "Pulse/distance"; + s = "pulse-distance"; else if (ir_type == IR_TYPE_NEC) - s = "NEC"; + s = "nec"; else - s = "Other"; + s = "other"; return sprintf(buf, "%s\n", s); } @@ -86,23 +86,22 @@ static ssize_t store_protocol(struct device *d, size_t len) { struct ir_input_dev *ir_dev = dev_get_drvdata(d); - u64 ir_type = IR_TYPE_UNKNOWN; + u64 ir_type = 0; int rc = -EINVAL; unsigned long flags; char *buf; - buf = strsep((char **) &data, "\n"); - - if (!strcasecmp(buf, "rc-5") || !strcasecmp(buf, "rc5")) - ir_type = IR_TYPE_RC5; - else if (!strcasecmp(buf, "pd")) - ir_type = IR_TYPE_PD; - else if (!strcasecmp(buf, "nec")) - ir_type = IR_TYPE_NEC; + while (buf = strsep((char **) &data, " \n")) { + if (!strcasecmp(buf, "rc-5") || !strcasecmp(buf, "rc5")) + ir_type |= IR_TYPE_RC5; + if (!strcasecmp(buf, "pd") || !strcasecmp(buf, "pulse-distance")) + ir_type |= IR_TYPE_PD; + if (!strcasecmp(buf, "nec")) + ir_type |= IR_TYPE_NEC; + } - if (ir_type == IR_TYPE_UNKNOWN) { - IR_dprintk(1, "Error setting protocol to %lld\n", - (long long)ir_type); + if (!ir_type) { + IR_dprintk(1, "Unknown protocol\n"); return -EINVAL; } @@ -120,12 +119,34 @@ static ssize_t store_protocol(struct device *d, ir_dev->rc_tab.ir_type = ir_type; spin_unlock_irqrestore(&ir_dev->rc_tab.lock, flags); - IR_dprintk(1, "Current protocol is %lld\n", + IR_dprintk(1, "Current protocol(s) is(are) %lld\n", (long long)ir_type); return len; } +static ssize_t show_supported_protocols(struct device *d, + struct device_attribute *mattr, char *buf) +{ + char *orgbuf = buf; + struct ir_input_dev *ir_dev = dev_get_drvdata(d); + + /* FIXME: doesn't support multiple protocols at the same time */ + if (ir_dev->props->allowed_protos == IR_TYPE_UNKNOWN) + buf += sprintf(buf, "unknown "); + if (ir_dev->props->allowed_protos & IR_TYPE_RC5) + buf += sprintf(buf, "rc-5 "); + if (ir_dev->props->allowed_protos & IR_TYPE_PD) + buf += sprintf(buf, "pulse-distance "); + if (ir_dev->props->allowed_protos & IR_TYPE_NEC) + buf += sprintf(buf, "nec "); + if (buf == orgbuf) + buf += sprintf(buf, "other "); + + buf += sprintf(buf - 1, "\n"); + + return buf - orgbuf; +} #define ADD_HOTPLUG_VAR(fmt, val...) \ do { \ @@ -149,11 +170,15 @@ static int ir_dev_uevent(struct device *device, struct kobj_uevent_env *env) /* * Static device attribute struct with the sysfs attributes for IR's */ -static DEVICE_ATTR(current_protocol, S_IRUGO | S_IWUSR, +static DEVICE_ATTR(protocol, S_IRUGO | S_IWUSR, show_protocol, store_protocol); +static DEVICE_ATTR(supported_protocols, S_IRUGO | S_IWUSR, + show_supported_protocols, NULL); + static struct attribute *ir_hw_dev_attrs[] = { - &dev_attr_current_protocol.attr, + &dev_attr_protocol.attr, + &dev_attr_supported_protocols.attr, NULL, }; -- 2.30.2